WO2009153371A1 - Liquid-heating device - Google Patents
Liquid-heating device Download PDFInfo
- Publication number
- WO2009153371A1 WO2009153371A1 PCT/ES2009/000331 ES2009000331W WO2009153371A1 WO 2009153371 A1 WO2009153371 A1 WO 2009153371A1 ES 2009000331 W ES2009000331 W ES 2009000331W WO 2009153371 A1 WO2009153371 A1 WO 2009153371A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tubular body
- heating
- lamp
- cables
- liquid
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
- F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
- F24H1/202—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply with resistances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
- F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
- F24H1/142—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using electric energy supply
Definitions
- the present invention relates to a device that has been designed to allow the heating of liquids, especially for the heating of water, oil and steam production, although it can also be used in other applications.
- the object of the invention is to provide a device for heating liquids, oils and steam production electrically, by means of which a substantial saving in electricity consumption is achieved.
- the device for the heating of liquids that the invention proposes solves in a fully satisfactory manner the aforementioned problem, allowing a heating of the water or liquid in question very quickly, of the order of 20-30% greater than with a resistance of equal power.
- the device that is recommended is constituted from a tubular body, determining the heat transmission surface, which can be either straight, curved, or adapt to the geometry of the installation in which it will be integrated, for example in the tank of a thermos, in a washing machine, in a pipe, in a dryer, in an iron, water boilers, oil boilers, steam boilers, etc., tubular body that can be obtained interchangeably from a material of a metallic nature, of high thermal conductivity, such as copper or aluminum, or of glass.
- this lamp will light up, heating much faster than a conventional resistance, so that said heat will also be transmitted extremely quickly to the fluid with which the tubular body comes into contact, having this one a high coefficient of thermal transmission.
- tubular body may have a series of partitions or longitudinal grooves, of the same material as this one, which act as heat transmitting elements.
- tubular body in the case where said tubular body is obtained in glass, it will act as a lens, increasing heat transmission and consequently the performance of the installation, to which we must add the fact that when The higher the water pressure, the greater the heat transmission through the device.
- Figure 1 shows a side elevation and sectional view of a device for heating liquids made in accordance with the object of the present invention, in the particular case in which it is applied to a pipe.
- Figure 2. Shows a side elevation and sectional view of a variant embodiment of the device in which it is integrated into the tank of a thermos.
- tubular body (1) which in the practical example chosen presents a circular section, but which could have different sections according to different design lines without affecting the essentiality of the invention, tubular body (1) whose outer surface is intended to come into contact with the liquid (2) to be heated, being able to integrate into a pipe (3) ), coaxially with it, as in the case of the example of Figure 1, or adopt a curved arrangement, such as that shown in Figure 2, in which the device is intended to be integrated into the tank of a thermos (6) for heating domestic sanitary water.
- the tubular body (1) will be obtained from glass, glass or any metal with a high coefficient of thermal conductivity, such as aluminum or copper.
- a lamp or bulb (4) is established, the configuration of which will be in accordance with the geometry adopted by the tubular body (1), electrically fed through the corresponding cables (5), so that by means of the power supply of said lamp (4) the lighting of the lamp is produced, a bulb that will quickly reach a high temperature, so that the heat generated by it will be transmitted to the fluid (2) through the tubular body ( 1), transmission whose efficiency will be increased in the case in which said tubular body (1) is made of glass or crystal, due to the lens effect it produces.
- the lamps (4) may be of the conventional type, halogen, infrared, ultraviolet, and power according to the specific needs of each case.
- the inside of the tubular body (1) will be fluid tight (2), being able to be closed at its ends, as shown in Figure 1, with a tight closing lid (7) or similar element for replacement of the lamp (4) when necessary, as well as conduits (8) through which the cables (5) tightly access said tubular body, said conduits (8) being able to materialize at the ends themselves of the tubular body (1), as shown in Figure 2, in which case the said ends will be coupled to the corresponding housing (6) to ensure a correct sealing of the set.
- the power supply of the lamp (4) can be carried out through a switch or a pressure switch that detects the opening of a tap.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The invention relates to a liquid-heating device that has been specially designed to heat water much more quickly (of the order of 20-30% more quickly) than a traditional resistor. The device consists of a tubular body (1), the outer surface of which is intended to come into contact with the liquid to be heated, which body is obtained from glass, crystal or any metal with high thermal conductivity, such as copper or aluminium. A lamp (4) is provided inside the aforementioned tubular body (1), the shape and dimensions of which correspond to those of the tubular body (1), said lamp (4) being electrically powered by cables (5) that extend into the tubular body (1) in a leak-tight manner.
Description
DISPOSTTTVO PARA EL CALENTAMIENTO DE LÍQUIDOS DISPOSTTTVO FOR HEATING LIQUIDS
D E S Γ R T P C T O ND E S Γ R T P C T O N
OBJETO DE LA INVENCIÓNOBJECT OF THE INVENTION
La presente invención se refiere a un dispositivo que ha sido concebido para permitir el calentamiento de líquidos, en especial para el calentamiento de agua, aceite y producción de vapor, si bien puede ser utilizado igualmente en otras aplicaciones.The present invention relates to a device that has been designed to allow the heating of liquids, especially for the heating of water, oil and steam production, although it can also be used in other applications.
El objeto de la invención es proporcionar un dispositivo para el calentamiento de líquidos, aceites y producción de vapor eléctricamente, mediante el cual se consiga un ahorro sustancial en el consumo eléctrico.The object of the invention is to provide a device for heating liquids, oils and steam production electrically, by means of which a substantial saving in electricity consumption is achieved.
ANTECEDENTES DE LA INVENCIÓNBACKGROUND OF THE INVENTION
Como es sabido, existen múltiples soluciones para el calentamiento de líquidos, y en especial de agua, aceite y producción de vapor como por ejemplo en sistemas de calefacción, agua sanitaria, lavadoras, secadoras, planchas, calderas de agua, calderas de aceite, calderas de vapor, etc, siendo una solución bastante común el empleo de resistencias eléctricas que, al hacer pasar una corriente a través de las mismas generan un calor que es aprovechado para calentar el agua o aceite.As is known, there are multiple solutions for heating liquids, and especially water, oil and steam production, such as heating, sanitary water, washing machines, dryers, irons, water boilers, oil boilers, boilers steam, etc., being a fairly common solution the use of electrical resistors that, by passing a current through them generate a heat that is used to heat water or oil.
Si bien este tipo de dispositivos cumplen satisfactoriamente la
ftinción para la que han sido previstos, presentan como problema fundamental un elevado consumo eléctrico, así como que la transmisión de calor resulta muy lenta, de manera que el tiempo que tienen que estar alimentadas eléctricamente las citadas resistencias es igualmente elevado, con las consecuentes y negativas repercusiones a nivel energético y de consumo inútil de agua, hasta que ésta se caliente, que ello supone.While these types of devices satisfactorily meet the ftinction for which they have been planned, present as a fundamental problem a high electrical consumption, as well as that the heat transmission is very slow, so that the time that the said resistances have to be electrically powered is equally high, with the consequent and negative repercussions at the energy level and of useless consumption of water, until it is heated, which this implies.
DESCRIPCIÓN DE LA INVENCIÓNDESCRIPTION OF THE INVENTION
El dispositivo para el calentamiento de líquidos que la invención propone resuelve de forma plenamente satisfactoria la problemática anteriormente expuesta, permitiendo un calentamiento del agua o líquido de que se trate sumamente rápido, del orden de un 20-30% mayor que con una resistencia de igual potencia.The device for the heating of liquids that the invention proposes solves in a fully satisfactory manner the aforementioned problem, allowing a heating of the water or liquid in question very quickly, of the order of 20-30% greater than with a resistance of equal power.
Para ello, el dispositivo que se preconiza está constituido a partir de un cuerpo tubular, determinante de la superficie de transmisión de calor, que puede ser indistintamente recto, curvo, o adaptarse a la geometría de la instalación en la que vaya a ser integrado, por ejemplo en el depósito de un termo, en una lavadora, en una tubería, en una secadora, en una plancha, calderas de agua, calderas de aceite, calderas de vapor, etc, cuerpo tubular que podrá estar obtenido indistintamente a partir de un material de naturaleza metálica, de elevada conductividad térmica, como por ejemplo de cobre o aluminio, o bien ser de vidrio.For this, the device that is recommended is constituted from a tubular body, determining the heat transmission surface, which can be either straight, curved, or adapt to the geometry of the installation in which it will be integrated, for example in the tank of a thermos, in a washing machine, in a pipe, in a dryer, in an iron, water boilers, oil boilers, steam boilers, etc., tubular body that can be obtained interchangeably from a material of a metallic nature, of high thermal conductivity, such as copper or aluminum, or of glass.
En el seno del citado cuerpo tubular se establece al menos una
lámpara o bombilla, cuya potencia dependerá de la aplicación específica para la que esté previsto el dispositivo, lámpara que podrá ser de diversos tipos, y que contará con los correspondientes cables de alimentación eléctrica, de manera que el citado cuerpo tubular en su instalación en la tubería o depósito de que se trate presentará un carácter estanco, contando con entradas y salidas estancas para los citados cables de alimentación.Within said tubular body at least one is established lamp or bulb, whose power will depend on the specific application for which the device is intended, lamp that can be of various types, and that will have the corresponding power cables, so that the said tubular body in its installation in the The pipe or tank in question will have a watertight nature, with watertight inputs and outputs for said power cables.
Así pues, mediante alimentación eléctrica de la citada lámpara, esta se encenderá, calentándose mucho más rápido que una resistencia convencional, de manera que dicho calor se transmitirá igualmente de forma sumamente rápida al fluido con el que entra en contacto el cuerpo tubular, al tener éste un alto coeficiente de transmisión térmica.Thus, by means of the power supply of said lamp, this lamp will light up, heating much faster than a conventional resistance, so that said heat will also be transmitted extremely quickly to the fluid with which the tubular body comes into contact, having this one a high coefficient of thermal transmission.
Opcionalmente el citado cuerpo tubular podrá disponer de una serie de tabiquillos o ranuras longitudinales, del mismo material que éste, que actúen como elementos transmisores del calor.Optionally, said tubular body may have a series of partitions or longitudinal grooves, of the same material as this one, which act as heat transmitting elements.
Por último cabe destacar que en el caso en el que el citado cuerpo tubular esté obtenido en vidrio, el mismo actuará como lente, aumentando la transmisión de calor y consecuentemente el rendimiento de la instalación, a lo que hay que añadir el hecho de que cuanto mayor sea la presión del agua mayor será la transmisión de calor a través del dispositivo.Finally, it should be noted that in the case where said tubular body is obtained in glass, it will act as a lens, increasing heat transmission and consequently the performance of the installation, to which we must add the fact that when The higher the water pressure, the greater the heat transmission through the device.
DESCRIPCIÓN DE LOS DΪBU.TOSDESCRIPTION OF THE DΪBU.TOS
Para complementar la descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las características del invento,
de acuerdo con un ejemplo preferente de realización práctica del mismo, se acompaña como parte integrante de dicha descripción, un juego de dibujos en donde con carácter ilustrativo y no limitativo, se ha representado lo siguiente:To complement the description being made and in order to help a better understanding of the features of the invention, In accordance with a preferred example of practical realization thereof, a set of drawings is attached as an integral part of said description, where, as an illustration and not limitation, the following has been represented:
La figura 1.- Muestra una vista en alzado lateral y en sección de un dispositivo para el calentamiento de líquidos realizado de acuerdo con el objeto de la presente invención, en el caso particular en el que el mismo se aplica a una tubería.Figure 1 shows a side elevation and sectional view of a device for heating liquids made in accordance with the object of the present invention, in the particular case in which it is applied to a pipe.
La figura 2.- Muestra una vista en alzado lateral y en sección de una variante de realización del dispositivo en el que éste se integra en el depósito de un termo.Figure 2.- Shows a side elevation and sectional view of a variant embodiment of the device in which it is integrated into the tank of a thermos.
REALIZACIÓN PREFERENTE DE LA INVENCIÓNPREFERRED EMBODIMENT OF THE INVENTION
A la vista de las figuras reseñadas puede observarse como el dispositivo para el calentamiento de líquidos que la invención propone se materializa en un cuerpo tubular (1), que en el ejemplo de realización práctica elegido presenta una sección circular, pero que podría presentar distintas secciones acordes a diferentes líneas de diseño sin que ello afecte a la esencialidad de la invención, cuerpo tubular (1) cuya superficie exterior está destinada a entrar en contacto con el líquido (2) a calentar, pudiéndose integrar en el seno de una tubería (3), coaxialmente con la misma, como en el caso del ejemplo de la figura 1, o bien adoptar una disposición curvada, como la mostrada en la figura 2, en la que el dispositivo está destinado a integrarse en el seno del depósito de un termo (6) para el calentamiento de agua corriente sanitaria.
En cualquier caso, el cuerpo tubular (1) estará obtenido a partir de vidrio, cristal o cualquier metal con un alto coeficiente de conductividad térmica, tal como aluminio o cobre.In view of the aforementioned figures, it can be seen how the device for heating liquids that the invention proposes is embodied in a tubular body (1), which in the practical example chosen presents a circular section, but which could have different sections according to different design lines without affecting the essentiality of the invention, tubular body (1) whose outer surface is intended to come into contact with the liquid (2) to be heated, being able to integrate into a pipe (3) ), coaxially with it, as in the case of the example of Figure 1, or adopt a curved arrangement, such as that shown in Figure 2, in which the device is intended to be integrated into the tank of a thermos (6) for heating domestic sanitary water. In any case, the tubular body (1) will be obtained from glass, glass or any metal with a high coefficient of thermal conductivity, such as aluminum or copper.
En el seno del citado cuerpo tubular (1) se establece una lámpara o bombilla (4), cuya configuración será acorde con la geometría que adopte el cuerpo tubular (1), alimentada eléctricamente a través de los correspondientes cables (5), de manera que mediante la alimentación eléctrica de la citada lámpara (4) se produce el encendido de la misma, bombilla que alcanzará rápidamente una alta temperatura, de manera que el calor generado por la misma será transmitido al fluido (2) a través del cuerpo tubular (1), transmisión cuya eficiencia se verá incrementada en el caso en el que dicho cuerpo tubular (1) sea de vidrio o cristal, por el efecto de lente que produce el mismo.Within the said tubular body (1) a lamp or bulb (4) is established, the configuration of which will be in accordance with the geometry adopted by the tubular body (1), electrically fed through the corresponding cables (5), so that by means of the power supply of said lamp (4) the lighting of the lamp is produced, a bulb that will quickly reach a high temperature, so that the heat generated by it will be transmitted to the fluid (2) through the tubular body ( 1), transmission whose efficiency will be increased in the case in which said tubular body (1) is made of glass or crystal, due to the lens effect it produces.
Las lámparas (4) podrán ser de tipo convencional, halógenas, infrarrojas, ultravioletas, y de potencia acorde con las necesidades específicas de cada caso.The lamps (4) may be of the conventional type, halogen, infrared, ultraviolet, and power according to the specific needs of each case.
Tal y como se ha comentado con anterioridad, el interior del cuerpo tubular (1) será estanco al fluido (2), pudiendo estar cerrado por sus extremos, tal como muestra la figura 1, contando con una tapa de cierre estanco (7) o elemento similar para recambio de la lámpara (4) cuando sea necesario, así como conductos (8) a través de los que los cables (5) acceden de forma estanca a dicho cuerpo tubular, pudiendo dichos conductos (8) materializarse en los propios extremos del cuerpo tubular (1), tal como muestra la figura 2, en cuyo caso los citados extremos se acoplarán a la correspondiente carcasa (6) para asegurar un correcto estanqueizado del
conjunto.As previously mentioned, the inside of the tubular body (1) will be fluid tight (2), being able to be closed at its ends, as shown in Figure 1, with a tight closing lid (7) or similar element for replacement of the lamp (4) when necessary, as well as conduits (8) through which the cables (5) tightly access said tubular body, said conduits (8) being able to materialize at the ends themselves of the tubular body (1), as shown in Figure 2, in which case the said ends will be coupled to the corresponding housing (6) to ensure a correct sealing of the set.
Por último cabe destacar que la alimentación eléctrica de la lámpara (4) se podrá llevar a cabo a través de un interruptor o un presostato que detecte la apertura de un grifo.
Finally, it should be noted that the power supply of the lamp (4) can be carried out through a switch or a pressure switch that detects the opening of a tap.
Claims
R E I V T N D T C A C T O N E SR E I V T N D T C A C T O N E S
Ia.- Dispositivo para el calentamiento de líquidos, que estando especialmente concebido para ser instalado en tuberías, sistemas de calefacción, de agua sanitaria, en depósitos, así como cualquier tipo de máquina que trabaje con agua caliente, se caracteriza porque está constituido a partir de un cuerpo tubular (1), cuya superficie externa está destinada a entrar en contacto con el líquido a calentar, cuerpo tubular (1) obtenido a partir de vidrio, cristal o cualquier metal de alta conductividad térmica, habiéndose previsto que en el seno del citado cuerpo tubular (1) se establezca al menos una lámpara (4) formal y dimensionalmente acorde con las dimensiones del citado cuerpo tubular (1), lámpara (4) alimentada eléctricamente a través de cables (5) que acceden estancamente al interior del cuerpo tubular (1).I a .- Device for the heating of liquids, which being specially designed to be installed in pipes, heating systems, sanitary water, in tanks, as well as any type of machine that works with hot water, is characterized in that it is constituted from a tubular body (1), whose external surface is intended to come into contact with the liquid to be heated, tubular body (1) obtained from glass, glass or any metal of high thermal conductivity, having been provided to be within of said tubular body (1) at least one lamp (4) is established formally and dimensionally in accordance with the dimensions of said tubular body (1), lamp (4) electrically fed through cables (5) that tightly access the interior of the tubular body (1).
2a.- Dispositivo para el calentamiento de líquidos, según reivindicación Ia, caracterizado porque los citados cables (5) acceden al cuerpo tubular (1) a través de conducciones (8) establecidas en las proximidades de los extremos del cuerpo tubular (1).2 .- Device for heating liquids according to claim I, characterized in that said cables (5) entering the tubular body (1) through conduits (8) provided in the vicinity of the ends of the tubular body (1 ).
3a.- Dispositivo para el calentamiento de líquidos, según reivindicación Ia, caracterizado porque los extremos del cuerpo tubular (1) incorporan medios de acoplamiento a la carcasa (6) del depósito en el que está destinado a instalarse, a través de los que son pasantes los cables de alimentación eléctrica (5).3 .- Device for heating liquids according to claim I to, wherein the ends of the tubular body (1) incorporating coupling means to the housing (6) of the tank where it is intended to be installed, through the which are the power supply cables (5).
4a.- Dispositivo para el calentamiento de líquidos, según reivindicación Ia, caracterizado porque el citado cuerpo tubular,
opcionalmente, dispone de una serie de tabiquillos o ranuras longitudinales, del mismo material que éste, que actúan como elementos transmisores del calor.
4 .- Device for heating liquids according to claim I, characterized in that said tubular body, optionally, it has a series of partitions or longitudinal grooves, of the same material as this one, which act as heat transmitting elements.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ESU200801329 | 2008-06-20 | ||
| ES200801852A ES2331680B1 (en) | 2008-06-20 | 2008-06-20 | DEVICE FOR HEATING LIQUIDS. |
| ESP200801852 | 2008-06-20 | ||
| ES200801329U ES1068111Y (en) | 2008-06-20 | 2008-06-20 | DEVICE FOR HEATING LIQUIDS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009153371A1 true WO2009153371A1 (en) | 2009-12-23 |
Family
ID=41433730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/ES2009/000331 WO2009153371A1 (en) | 2008-06-20 | 2009-06-16 | Liquid-heating device |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2009153371A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721181A (en) * | 2012-06-27 | 2012-10-10 | 安徽好来西科技有限公司 | Heating pipe of instant electric water heater |
| CN109595821A (en) * | 2017-09-30 | 2019-04-09 | 芜湖美的厨卫电器制造有限公司 | Electric heater and its security protection system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191004790A (en) * | 1910-02-25 | 1910-07-14 | John William Ewart | Improvements in the Production of Hot Water, and Apparatus therefor. |
| GB2173693A (en) * | 1985-04-11 | 1986-10-22 | Breakaway Tackle Dev | Heater for windscreen wash liquid |
| US5740315A (en) * | 1992-06-30 | 1998-04-14 | Kabushiki Kaisha Komatsu Seisakusho | Fluid heating apparatus |
| US20040131346A1 (en) * | 2003-01-03 | 2004-07-08 | Chamberlain Roland J. | Energy efficient electric water heater system that provides immediate hot water at a point of use and a method therefor |
-
2009
- 2009-06-16 WO PCT/ES2009/000331 patent/WO2009153371A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191004790A (en) * | 1910-02-25 | 1910-07-14 | John William Ewart | Improvements in the Production of Hot Water, and Apparatus therefor. |
| GB2173693A (en) * | 1985-04-11 | 1986-10-22 | Breakaway Tackle Dev | Heater for windscreen wash liquid |
| US5740315A (en) * | 1992-06-30 | 1998-04-14 | Kabushiki Kaisha Komatsu Seisakusho | Fluid heating apparatus |
| US20040131346A1 (en) * | 2003-01-03 | 2004-07-08 | Chamberlain Roland J. | Energy efficient electric water heater system that provides immediate hot water at a point of use and a method therefor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721181A (en) * | 2012-06-27 | 2012-10-10 | 安徽好来西科技有限公司 | Heating pipe of instant electric water heater |
| CN109595821A (en) * | 2017-09-30 | 2019-04-09 | 芜湖美的厨卫电器制造有限公司 | Electric heater and its security protection system |
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